Software iOS versions are typically rolled out via over-the-air (OTA). When Apple releases a new update for certain devices, your carrier will post an update notification and along with some quick notes on the new features, bug fixes, system requirements, and the like. If you see this update notification on your device, then you can
How to fix Software update failed error on Apple iPad Pro 2018, unable to install new iOS update [Troubleshooting Guide]
